1 /* dynar - a generic dynamic array */
3 /* Copyright (c) 2004, 2005, 2006, 2007, 2009, 2010. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
12 #include <string.h> /* memcpy */
14 #include "xbt/misc.h" /* SG_BEGIN_DECL */
15 #include "xbt/function_types.h"
19 /** @addtogroup XBT_dynar
20 * @brief DynArr are dynamically sized vector which may contain any type of variables.
22 * These are the SimGrid version of the dynamically size arrays, which all C programmer recode one day or another.
24 * For performance concerns, the content of DynArr must be homogeneous (in
25 * contrary to dictionnaries -- see the \ref XBT_dict section). You thus
26 * have to provide the function which will be used to free the content at
27 * structure creation (of type void_f_ppvoid_t or void_f_pvoid_t).
29 * \section XBT_dynar_exscal Example with scalar
30 * \dontinclude dynar.c
37 * \until end_of_traversal
40 * \until xbt_dynar_free
42 * \section XBT_dynar_exptr Example with pointed data
44 * \skip test_dynar_string
52 * \skip end_of_doxygen
55 * Note that if you use dynars to store pointed data, the
56 * xbt_dynar_search(), xbt_dynar_search_or_negative() and
57 * xbt_dynar_member() won't be for you. Instead of comparing
58 * your pointed elements, they compare the pointer to them. See
59 * the documentation of xbt_dynar_search() for more info.
62 /** @defgroup XBT_dynar_cons Dynar constructor and destructor
67 /** \brief Dynar data type (opaque type) */
68 typedef struct xbt_dynar_s *xbt_dynar_t;
71 XBT_PUBLIC(xbt_dynar_t) xbt_dynar_new(const unsigned long elm_size,
72 void_f_pvoid_t const free_f);
73 XBT_PUBLIC(xbt_dynar_t) xbt_dynar_new_sync(const unsigned long elm_size,
74 void_f_pvoid_t const free_f);
75 XBT_PUBLIC(void) xbt_dynar_free(xbt_dynar_t * dynar);
76 XBT_PUBLIC(void) xbt_dynar_free_voidp(void *dynar);
77 XBT_PUBLIC(void) xbt_dynar_free_container(xbt_dynar_t * dynar);
78 XBT_PUBLIC(void) xbt_dynar_shrink(xbt_dynar_t dynar, int empty_slots);
79 XBT_PUBLIC(void) xbt_dynar_dump(xbt_dynar_t dynar);
82 /** @defgroup XBT_dynar_array Dynar as a regular array
88 XBT_PUBLIC(void) xbt_dynar_get_cpy(const xbt_dynar_t dynar,
89 const unsigned long idx,
91 XBT_PUBLIC(void) xbt_dynar_set(xbt_dynar_t dynar, const int idx,
93 XBT_PUBLIC(void) xbt_dynar_replace(xbt_dynar_t dynar,
94 const unsigned long idx,
97 XBT_PUBLIC(void) xbt_dynar_insert_at(xbt_dynar_t const dynar,
98 const int idx, const void *src);
99 XBT_PUBLIC(void) xbt_dynar_remove_at(xbt_dynar_t const dynar,
100 const int idx, void *const dst);
101 XBT_PUBLIC(void) xbt_dynar_remove_n_at(xbt_dynar_t const dynar,
102 const unsigned int n, const int idx);
105 XBT_PUBLIC(unsigned int) xbt_dynar_search(xbt_dynar_t const dynar, void *elem);
106 XBT_PUBLIC(signed int) xbt_dynar_search_or_negative(xbt_dynar_t const dynar, void *const elem);
107 XBT_PUBLIC(int) xbt_dynar_member(xbt_dynar_t const dynar, void *elem);
108 XBT_PUBLIC(void) xbt_dynar_sort(xbt_dynar_t const dynar,
109 int_f_cpvoid_cpvoid_t compar_fn);
110 XBT_PUBLIC(void) xbt_dynar_three_way_partition(xbt_dynar_t const dynar,
111 int_f_pvoid_t color);
112 XBT_PUBLIC(int) xbt_dynar_compare(xbt_dynar_t d1, xbt_dynar_t d2,
113 int(*compar)(const void *, const void *));
114 XBT_PUBLIC(void *) xbt_dynar_to_array (xbt_dynar_t dynar);
117 /** @defgroup XBT_dynar_misc Dynar miscellaneous functions
123 XBT_PUBLIC(unsigned long) xbt_dynar_length(const xbt_dynar_t dynar);
124 XBT_PUBLIC(int) xbt_dynar_is_empty(const xbt_dynar_t dynar);
125 XBT_PUBLIC(void) xbt_dynar_reset(xbt_dynar_t const dynar);
126 XBT_PUBLIC(void) xbt_dynar_merge(xbt_dynar_t *d1, xbt_dynar_t *d2);
129 /** @defgroup XBT_dynar_perl Perl-like use of dynars
135 XBT_PUBLIC(void) xbt_dynar_push(xbt_dynar_t const dynar, const void *src);
136 XBT_PUBLIC(void) xbt_dynar_pop(xbt_dynar_t const dynar, void *const dst);
137 XBT_PUBLIC(void) xbt_dynar_unshift(xbt_dynar_t const dynar,
139 XBT_PUBLIC(void) xbt_dynar_shift(xbt_dynar_t const dynar, void *const dst);
140 XBT_PUBLIC(void) xbt_dynar_map(const xbt_dynar_t dynar,
141 void_f_pvoid_t const op);
144 /** @defgroup XBT_dynar_ctn Direct manipulation to the dynars content
147 * Those functions do not retrieve the content, but only their address.
152 XBT_PUBLIC(void *) xbt_dynar_set_at_ptr(const xbt_dynar_t dynar,
153 const unsigned long idx);
154 XBT_PUBLIC(void *) xbt_dynar_get_ptr(const xbt_dynar_t dynar,
155 const unsigned long idx);
156 XBT_PUBLIC(void *) xbt_dynar_insert_at_ptr(xbt_dynar_t const dynar,
158 XBT_PUBLIC(void *) xbt_dynar_push_ptr(xbt_dynar_t const dynar);
159 XBT_PUBLIC(void *) xbt_dynar_pop_ptr(xbt_dynar_t const dynar);
162 /** @defgroup XBT_dynar_speed Speed optimized access to dynars of scalars
165 * While the other functions use a memcpy to retrieve the content into the
166 * user provided area, those ones use a regular affectation. It only works
167 * for scalar values, but should be a little faster.
172 /** @brief Quick retrieval of scalar content
173 * @hideinitializer */
174 # define xbt_dynar_get_as(dynar,idx,type) \
175 (*(type*)xbt_dynar_get_ptr((dynar),(idx)))
176 /** @brief Quick setting of scalar content
177 * @hideinitializer */
178 # define xbt_dynar_set_as(dynar,idx,type,val) \
179 (*(type*)xbt_dynar_set_at_ptr((dynar),(idx))) = val
180 /** @brief Quick retrieval of scalar content
181 * @hideinitializer */
182 # define xbt_dynar_getlast_as(dynar,type) \
183 (*(type*)xbt_dynar_get_ptr((dynar),xbt_dynar_length(dynar)-1))
184 /** @brief Quick retrieval of scalar content
185 * @hideinitializer */
186 # define xbt_dynar_getfirst_as(dynar,type) \
187 (*(type*)xbt_dynar_get_ptr((dynar),0))
188 /** @brief Quick insertion of scalar content
189 * @hideinitializer */
190 # define xbt_dynar_insert_at_as(dynar,idx,type,value) \
191 *(type*)xbt_dynar_insert_at_ptr(dynar,idx)=value
192 /** @brief Quick insertion of scalar content
193 * @hideinitializer */
194 # define xbt_dynar_push_as(dynar,type,value) \
195 *(type*)xbt_dynar_push_ptr(dynar)=value
196 /** @brief Quick removal of scalar content
197 * @hideinitializer */
198 # define xbt_dynar_pop_as(dynar,type) \
199 (*(type*)xbt_dynar_pop_ptr(dynar))
202 /** @defgroup XBT_dynar_cursor Cursors on dynar
205 * Cursors are used to iterate over the structure. Never add elements to the
206 * DynArr during the traversal. To remove elements, use the
207 * xbt_dynar_cursor_rm() function.
209 * Do not call these function directly, but only within the xbt_dynar_foreach
215 XBT_PUBLIC(void) xbt_dynar_cursor_rm(xbt_dynar_t dynar,
216 unsigned int *const cursor);
218 /* do not use this structure internals directly, but use the public interface
219 * This was made public to allow:
220 * - the inlining of the foreach elements
221 * - sending such beasts over the network
224 typedef struct xbt_dynar_s {
227 unsigned long elmsize;
229 void_f_pvoid_t free_f;
232 static XBT_INLINE void
233 _xbt_dynar_cursor_first(const xbt_dynar_t dynar _XBT_GNUC_UNUSED,
234 unsigned int *const cursor)
236 /* iterating over a NULL dynar is a no-op (but we don't want to have uninitialized counters) */
238 //XBT_DEBUG("Set cursor on %p to the first position", (void *) dynar);
242 static XBT_INLINE int
243 _xbt_dynar_cursor_get(const xbt_dynar_t dynar,
244 unsigned int idx, void *const dst)
246 if (!dynar) /* iterating over a NULL dynar is a no-op */
249 if (idx >= dynar->used) {
250 //XBT_DEBUG("Cursor on %p already on last elem", (void *) dynar);
253 // XBT_DEBUG("Cash out cursor on %p at %u", (void *) dynar, *idx);
255 memcpy(dst, ((char *) dynar->data) + idx * dynar->elmsize,
263 /** @brief Iterates over the whole dynar.
265 * @param _dynar what to iterate over
266 * @param _cursor an integer used as cursor
270 * Here is an example of usage:
275 xbt_dynar_foreach (dyn,cpt,str) {
276 printf("Seen %s\n",str);
280 * Note that underneath, that's a simple for loop with no real black
281 * magic involved. It's perfectly safe to interrupt a foreach with a
282 * break or a return statement.
284 #define xbt_dynar_foreach(_dynar,_cursor,_data) \
285 for (_xbt_dynar_cursor_first(_dynar,&(_cursor)) ; \
286 _xbt_dynar_cursor_get(_dynar,_cursor,&_data) ; \
292 #endif /* _XBT_DYNAR_H */